Michael alissoff



M. ALISSOPF. Copying PadJ No. 231,517. Patented Aug. 24,1880.

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N. PEIERS, PHQJO LITHOGRAPNEK WASHINGTON D c II TED; STATES PATENT OFFIcE.

MICHAEL ALISSOFF, OF ST. PETERSBURG, RUSSIA, ASSIGNOR TO CHARLES GEORGE KLEBERG, OF LONDON.

COPYING-PAD.

SPECIFICATION forming part 'of Letters Patent No. 231,517, dated August 24, 1880.

Application filed September 17, 1879. Patented in Belgium June 16, 1879, in Russia July 2, 1879', in France September 3, 1879, and in England February 25, 1880.

To all whom it may concern:

Be it known that I, MICHAEL ALISSOFF, a subject of the Emperor of l-tussia, and a resident of $t. Petersburg, Russia, have invented an Improved Copying Pad orMatriX, for which I have obtained Belgian Letters Patent June 16, 1879, and of which the following is a specification, reference being had to the accompanying drawing.

My invention relates to the methods of obtaining a number of facsimile copies of written or printed matter by writing or printing the original copy with aniline or specially-prepared inks, and then transferring the impression to a pad or matrix having a prepared surface, from whicha number of impressions on ordinary paper may be obtained without inking the printing-surface thus prepared.

The object of my invention is to produce an improved transfer pad or matrix for this purpose and this object I attain by preparing the surface to which the original writing or printing is to be transferred in the following manner:

I coat sized or unsized paper on one side with a composition consisting of animal glue, glycerine, and water in the following proportions: about eight pounds of animal glue and two pounds of glycerine and; sufficient water say about twenty pounds-to give the composition the desired consistency. To this about two pounds of soap may be added, and also,

' if desired, two pounds of baryta orother white insoluble material, to give more consistency and gloss to the composition. Whether either of these two last substances are used or not, a solution of tannin should be added to the mixture, in quantity-say about five pounds of tannin solution-sufficient to prevent the composition, when applied to the paper, from becomingsticky; or, if preferred, the paper which has been coated with a composition of the above ingredients Without the tannin may be washed with a solution of tannin.

The paper to which the composition is to be applied may be of any suitable thickness,and if not transparent may be made so, if desired, by any of the ordinary and well-known means. To transfer to this surface the original matter I printed or written in prepared aniline Ink, I

place a sheet, A, of the above prepared paper on a sheet, B, of damp flannel or cloth laid on a zinc plate or on oil-paper, O. The surface of the prepared paper, which I term polygraphic paper, is then sponged with clean water, or in hot weather, with water containing a little alum, and the original written or printed sheet is then laid, face downward, on

the polygraphio paper. Then another piece of damp flannel or cloth and a zinc plate or oilpaper are laid on the top, and the whole pile subjected to pressure in an ordinary copyingpress or by other suitable means. WVhen the pile is taken out of the press and the original detached from the polygraphic paper, it will 6 5 be found that the written or printed matter has been transferred to the paper.

To obtain copies or impressions from the printing-surface thus formed, after removing the original, I place a sheet, D, of ordinary paper, damp or dry, on the surface of the pro pared sheet,in place of the detached original, and proceed in the same way as in transferring to the polygraphio or prepared sheet. In this manner I can obtain about forty copies by repeating the operation.

If copies or transfers are to be taken from two, four, six, or eight pages at once, I place a sheet of wet polygraphic paper on each page,

with damp flannels and zinc plates between the leaves of polygraphic paper, and proceed in the manner described above. I

The inks with which the original is to be written or printed, and which I call polygraphic inks, are prepared as follows: To

and the composition has sufficient consistency 5 to he used as printers ink.

The polygraphic printing-ink is more particularly useful for printing letter-heads, bill- The ink can then heads, circulars, 850., so that if polygraphic ink be used for both the printing and writing the copies or impressions taken will include both written and printed matter.

In using or preparing the polygraphic ink the hands are apt to become stained. These stains can be readily removed by a solution of tartaric acid in strong alcohol.

I do not desire to claim in this application the method of obtaining copies by causing an absorbent gelatinous surface to take an impression from the original, and then pressing sheets of paper (damped or not) on this prepared surface; but

I claim as my invention 

